Dectospot 10 mg/ml Spot-on Solution for Cattle and Sheep
Active ingredient: Deltamethrin
Form
Spot-on
Species
Manufacturer
Bimeda Animal Health Limited
VMD MA No.
50146/4023
What it's used for
As a topical application for the control of lice and flies on cattle; ticks, lice, keds and established blowfly strike on sheep and lice and ticks on lambs...
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Prescription required
Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.
Dectospot 10 mg/ml Spot-on Solution for Cattle and Sheep — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
and established blowfly strike on sheep and lice and ticks on lambs.
On cattlefor the control of both sucking and biting lice, including
bovis, Solenopotes capillatus, Linognathus vituli
eurysternus on all ages of cattle including dairy cattle producing milk for human
consumption. Also as an aid in the control of both biting and nuisance flies
including ,
Hydrotaea irritans.
On sheep: For the control of ticks Ixodes ricinus and of lice and keds and
established blowfly strike.
On lambs: For the control of ticks and lice .
- For the 250ml and 500ml presentations a graduated chamber attached to
the container is used.
- For the 1 litre and 2.5 litre presentations it is recommended to use an
appropriate applicator.
The recommended use of the application devices is illustrated below.
1. Use of the graduated chamber on the 250ml and 500 ml containers:
Revised: February 2020
AN: 01423/2019
2. Attaching the 1 and 2.5 litre containers to the recommended applicator:
Dose:
Cattle: 10 ml
Sheep: 5ml
Lambs (under 10 kg bodyweight or 1
month of age): 2.5ml
Administration: Apply a single dose with the special dispenser pack or the
Dectospot Applicator on one spot on the mid-line of the back at the shoulders
as directed on dispenser or applicator gun pack. For blowfly strike on sheep,
see following specific indication directions.
Lice on cattle
clearance of all lice may take 4 - 5 weeks during which time lice hatch from the
eggs and are killed. A very few lice may survive on a small minority of animals.
Therefore, it may be necessary on rare occasions to re-treat an animal 6 - 8
weeks later.
Revised: February 2020
AN: 01423/2019
Page 5 of 8Flies on cattle:
treatment will depend on the numbers and species of flies present. Where
horn-flies predominate, good control can be expected for 4 - 8 weeks.
Treatment for fly control should not be repeated within four weeks.
Ticks on sheep:
control of ticks attaching to animals of all ages, for up to 6 weeks after
treatment.
Keds and lice on sheep:
in short or long fleece will reduce the incidence of a biting louse or ked
infestation over a 4 - 6 week period after treatment.
N.B. For control of ticks, keds and lice on sheep, the fleece should be parted
and Spot On applied to the skin of the animal.
When using the Dectospot applicator application to the skin can be achieved by
inserting the T bar to separate the fleece and penetrate down to the skin level
before squeezing the applicator handle.
Established blowfly strike on sheep:
as soon as the fly strike is seen. One application will ensure blowfly larvae are
killed in a short time. In the case of more advanced strike lesions, clipping out
of stained wool before treatment is advisable.
Lice and ticks on lambs: Application to the mid-point of the shoulders will
provide useful control of ticks for up to 6 weeks after treatment, and will reduce
the incidence of biting lice over a 4-6 week period after treatment.
Revised: February 2020
AN: 01423/2019
after treatment. This is of no long term detriment to the animal.
Revised: February 2020
AN: 01423/2019
frequent and repeated use of ectoparasiticides from the same class over an
extended period of time as these practices increase the risk of development of
resistance and could ultimately result in ineffective therapy.
i) Special precautions for use in animals
For external use only.
ii) Special Precautions to be taken by the person administering the product to
animals
Wear protective clothing including waterproof apron and boots and impervious
gloves when either applying the product or handling recently treated animals.
Remove heavily contaminated clothing immediately and wash before use.
Wash splashes from skin immediately with soap and plenty of water.
Wash hands and exposed skin after handling this product and before meals. In
case of contact with eyes, rinse immediately with plenty of clean, running water
and seek medical advice.
In case of accidental ingestion, wash out mouth immediately with plenty of
water and seek medical advice.
Do not smoke, drink or eat while handling the product.
This product contains deltamethrin which may produce tingling, itchiness and
blotchy redness on exposed skin. If you feel unwell after working with this
product, consult your doctor and show this label. Advice to medical
practitioners:
Poisons Information Service.
iii) Other precautions
Deltamethrin is very toxic to dung fauna, aquatic organisms and honey bees, is
persistent in soils and may accumulate in sediments.
The risk to aquatic ecosystems and dung fauna can be reduced by avoiding too
frequent and repeated use of deltamethrin (and other synthetic pyrethroids) in
cattle and sheep, e.g. by using only a single treatment per year on the same
pasture. The risk to aquatic ecosystems will be further reduced by preventing
treated sheep from entering watercourses for one hour immediately after
treatment.
enhance deltamethrin toxicity. Do not mix any other insecticide or acaricide with
Dectospot Spot-on Solution.
storage conditions. Keep the container in the outer carton in order to protect
from light.
Store in tightly closed original container away from food, drink and animal
feeding stuffs.
Cattle (milk): zero hours
Sheep (meat and offal): 35 days
This product is not authorised for use in ewes producing milk for human
consumption.
5.
This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.
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Other Products Containing Deltamethrin
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
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